Envelop.



W. F. GRAMPP & W. D. CARSON.

ENVELOP.

APPLIOATION FILED MAR. 7, 1912.

1 ,047,5 1 5 Patented Dec. 17, 1912.

2 SHEETS-SHEET 1.

W. F. GRAMPP & W. D. CARSON.

ENVBLOP.

APPLICATION FILED MAR. 7, 1912.

1,047,5 15. Patented Dec. 17, 1912.

2 SHEETS-SHEET 2.

WILLIAM FBEDRICK FUMTED STATES emrr'nma WILLIAM navm 043308, 01' Sr, sun(mason assrenoa TO samenanrr;

. s men. 2,324.

To all whom 'it may concern;

United States, residing at the city of- St.

Louis, State of Missouri, have'inve'nted certain new and usefulImprovements in; Fmvelops, of which the following is a] spec fication.

- is-a similar view showing the envelop closed This application is acontinuation of the application of William D. Carson and William F.Grampp, Serial No. 561,480, filed May 14, 1 910.

This invention relates to improvements in envelops, and has for itsprimary object to provide an envelop having novel, means for sealingsame in addition to the ordinary sealing means, whereby an effectivedouble seal is formed so that the sealed envelop can not be openedwithout being mutilated.

Further, the present invention consists of certain novel features ofconstruction and arrangement of parts as will be hereinafter more fullydescribed and pointed out in the claim.

In the accompanying drawin s forming part of this specification, in whiclike numbers of reference denote like parts wherever they occur, Figure1 is a plan view of the blank'from which this improved envelop isformed; Fig. 2 is a rear elevation of the completed envelop, showingsame open; Fig. 3

and sealed ready for mailing; Fig. 4 is a plan view of the blank fromwhich an envelop that embodies an alternate form of the invention isformed; Fig. 5 is a rear elevation of the completed alternate form ofthe invention, showing same open; and Fig. 6 is a similar view of sameshown closed and sealed ready for mailing. f

The blank from which the envelop is formed comprises the body or faceportion 1, flaps 2 at the opposite ends thereof, and flaps 3 and 4 atthe top and bottom, respectively, of said body portion. Each flap 2 ispreferably formed with a rectangular configuration and is provided atthe upper and lower edges thereof with extensions 5 and 6, respectively,the edge of each extension bethe beveled edge of the extension 5 beingser- Specification 0: mm: nan. i iatfifa -1]' 5, 17 continuation ofapplication Serial n se1,4ao,fnna Kay 14, 1a1 o.' (can application;alea' lhnnf z .11, t-heap"- pose heremafterdescrib'edhf;,Theupper, flap3 and thelower-flap .4 are form, somewhat triangulanin, shape, andt the:latter is provided .with a slot .8 near its free end, said'slot beingpreferably arcu'ated and adapted to receive a locking tongue 9 formed atthe rated to lemma 7 a;

tours,- mssouar;

apex of the upper flap 3. 'The tongue" 9 is provided with a. pluralityof. inwardly-extendlng diverging fangs 10, there being preferably threeof said fangs, two of which project from opposite sides of the bodyportion of said tongue, and the third being located in substantially themiddle of the bodyportion of said tongue between the two side fangs. Thebod portion of the tongue 9 converges inwardly and, at its Widest part,is approximately equal in width to the length of the slot 8, in order tofit in the latter, while the greatest width of the tongue 9, 2'. e., thedistancebetween the outer extremities of the side fangs 10, isrelatively greater than the length of the slot 8, so that, when thetongue 9 is inserted in the slot 8, the fangs 10 are pressed inwardly bythe ends of the slot 8 until after said tongue has entered said slot,whereupon the fangs 1O spread outwardly and thereby effectively preventthe withdrawal of said tongue without tearing or injuring one ormore ofsaid fangs.

A suitable adhesive is preferably applied to the inner faces of theextensions 5 and 6 and, also, to the inner faces of the flaps 3 and 4,adjacent the edges thereof. In order to form the completed envelop fromthe blank hereinabovedescribed, the end flaps 2 are folded against therear or inner face of the body portion 1, along the dotted lines A, andthe extensions 5 and 6 are then folded outwardly along the dotted linesB and the adhesive thereon is moistened to cause said extensions toadhere to the outer faces of the flaps 2, said flaps 2 being preferablyformed with such length that the end edges thereof nearly touch at themiddle of said body portion, as best seen in Fig. 2. The bottom flap 4is then folded over the flaps 2, along the dotted line C, and sealedthereto by the adhesive on its inner face in the manner of an ordinaryenvelop. The envelop is thus completed, as shown in Fig. 2, and is readyto much farther apart than the length of sa-i slot, said fangs will bepressed inwardly while entering said slot and will, after passingentirely through said slot, regain their orlginal positions relative tothe body portion of said tongue, as depicted in Fig. 3, thereby forminga lock which can not be opened without detection, 6. 6., in case aneffort is made to Withdraw the tongue 9 from the slot 8, the side fangs10 will lock themselves in the ends of the slot 8 and the middle fang 10will hook itself on the upper edge of said slot, with the result thatsaid tongue is pre vented from being withdrawn from said slot, Withoutone or more of said fangs being torn or injured, and thus the opening ofthe envelop after once being closed will be readily detected. When theupper flap 3 is folded against the flaps 2 as just described,

the former covers the extensions 5 and 6- and parts of the flaps 2 and4, and, if desired, by moistening the adhesive on the inner face of saidflap 3, same may be sealed to parts of the outer face of the extensions5 and flaps 2 and 4. Some of the adhesive on flap 3 not only adheres tothe teeth 7 but, also, to the flaps 2 in the spaces between said teeth,thereby forming a double seal near the upper corners of said flap 3.This double seal formed by the flap 2 and the serrated extensions 5produces indentations on the flap 3 which can not be readily removed,and'should the extensions be unsealed and withdrawn they could never bereplaced to cause the teeth 7 to conform to the indentations first madein the flaps 2, and hence the opening of the envelop would be readilydetected. After the envelop is sealed and the tongue 9 is inserted intothe slot 8 as hereinabove described, the double seal and the lockingtongue 9 prevent the envelop from being opened without detection.

In the alternate form of the blank depicted in Fig. 4, same has the bodyportion 1, end flaps 2, and upper and lower flaps 3 and 4, but insteadof each flap 2 being formed with a rectangular configuration, the upperedge of same slopes downwardly from a point near the inner end thereofand the extension 5 is formed on the sloping edge of said flap 2, saidextension having its upper or longest edge serrated to form the teeth 7thereon. The flap 4 has the arcuated slot 8 formed therein, in order toreceive the tongue 9 borne by the apex of the flap 3. Said tongue 9, inthis form, is preferably formed with somewhat of a semiellipticalconfiguration having its end pointed to readily enter the slot 8, andeach side of said tongue is provided with an ear or fang 11, thegreatest width-of said tongue, 2'. e., the distance between theextremities of said ears being relatively greater than the length of theslot 8. As hereinabove described, an adhesive is applied to the innerfaces of the extensions 5 and 6 and, also,

to the inner faces of the flaps 3 and 4 adjacent the edges thereof. Theend flaps 2 are first folded against the inner face of the body portion1 along the dotted lines A, and the extensions 5 and 6 are then foldedoutwardly along the dotted lines D, and the adhesive matter thereon ismoistened to cause said extensions to adhere to the outer faces of theflaps 2. The bottom flap 4 is then folded over the flaps 2, along thedotted'line C, and sealed thereto by the adhesive on its inner face ashereinabove described, so as to form the completed envelop asillustrated in Fig. 5. In order to close and seal theenvelop, the upperflap 3 is folded over the flaps 2, along the dotted line D, and the tone 9 is then inserted through the slot 8 in ap 4. The ears 11 being muchfarther apart than the length of the sloti8, said ears are pressedinwardly while the same enter said slot and, after passing entirelythrough said slot, will spread outwardlyv and assume their normalposition relative the body portion of said tongue as depicted in Fig. 6,thereby preventing said tongue from being withdrawn from the slot 8without one or both of said ears being torn or injured and thus theopening of the envelop will be readily detected. The adhesive matter onthe inner face of flap 3 is moistened so as to seal said flap to theextensions 5 and flaps 2 and 4, and some of the adhesive not onlyadheres to the teeth 7, but, also, to the flaps 2 in the spaces betweensaid teeth, thereby forming a double seal which, in this form, extendsalong substantially the entire length of each extension 5. This doubleseal and the locking tongue 9 preventthe opening of the sealed envelopwithout detection as hereinabove described.

We claim:

An envelop comprising a body portion having end flaps, a bottom flap anda sealing flap, the end flaps being folded against the body portion andeach having a top and bottom extension, the top edge of each topextension having an inclined portion which is provided with spacedteeth, each of said top and bottom extensions of both end flaps beingfolded onto and secured to the outer face of the end flap that bearssame, the bottom flap being folded onto the outer faces of the end flapsand over the outer faces of the bottom extensions of the end flaps andcompletely overlying same, the sealing flap being provided with adhesivewhich when the sealing flap is closed adheres to the teeth of the endflap top extensions and with the end flaps in the spaces between theteeth our signatures in the presence of two witvto form a double seal,said teeth when the nesses.-

sealing flap is pressed into place forming in: WILLIAM FREDRIGK GRALHP.dentations in said sealing flap, and said seal- WILLIAM DAVID CARSON.

5 ing flap in closed position completely over- Witnesses:

lying the top extensions of the'end flaps. GEORGE G. ANDERSON,

In testimony whereof we hereunto aflix Bn mn VON BEHRENS.

